InChI=1S/C20H26O4/c1-6-19(4)15(22)9-12-11(16(19)23)7-8-14-18(2,3)17(24)13(21)10-20(12,14)5/h6-7,9,14,16-17,23-24H,1,8,10H2,2-5H3/t14-,16+,17-,19+,20+/m1/s1